The European Physical Journal Special Topics

, Volume 222, Issue 9, pp 2373–2379 | Cite as

Experimental and theoretical determination of transition dipole moments of ethyl 5-(4-aminophenyl)- and 5-(4-dimethylaminophenyl)-3-amino-2,4-dicyanobenzoate

  • M. JozefowiczEmail author
  • J. R. Heldt
  • J. Heldt
Regular Article


The absorption and fluorescence transition dipole moments (\(\hat M_{ge}\) and \(\hat M_{eg}\)) for ethyl 5-(4-aminophenyl)-3-amino-2, 4-dicyanobenzoate (EAADCy) and ethyl 5-(4-dimethylaminophenyl)-3-amino-2, 4-dicyanobenzoate (EDMAADCy) have been determined on the basis of the steady-state and time-resolved spectroscopic measurements and semiempirical quantum-chemical calculations. The values of the transition dipole moments of perpendicular and flattened forms of the investigated molecules were estimated as a function of the solvent polarity. Noted differences between the absorption and emission transition dipole moments (i.e., \({{\hat M_{ge} } \mathord{\left/ {\vphantom {{\hat M_{ge} } {\hat M_{eg} }}} \right. \kern-\nulldelimiterspace} {\hat M_{eg} }} \ne 1\)) confirm that the change of the electronic and molecular structure take place in the excited state.


European Physical Journal Special Topic Transition Dipole Moment Physical Journal Special Topic Table Intramolecular Charge Transfer Band Strong Electron Donor Group 
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Copyright information

© EDP Sciences and Springer 2013

Authors and Affiliations

  1. 1.Institute of Experimental PhysicsUniversity of GdanskGdanskPoland

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